What does Jeremiah 15:1 mean?

Then the Lord said to me, Even if Moses and Samuel stood before me and begged, I wouldn’t change my mind about these people. Send them away from me. Tell them to go. Jeremiah 15:1 - Modern Text Bible

(God tells Jeremiah that even the greatest intercessors couldn’t change His decision—He’s determined to send the people away because of their persistent rebellion.)